Stropping and honing razor



Feb. 16, 1932. F. ROSENTHAL STROPPING AND HONING RAZOR Filed July 25 mxmm\mmwm INVENTOR. FRANK RosEA/THAL- V V Patented Feb. 16, 1932 FRANK ROSENTI-IAL, OF, SAN FRANCISCO, CALIFORNIA s'raorrmeann nonme RAZOR Application filed July 25,

This invention relates to safety razors and has for its object a combined razor, strop and hone so that the'razor. without dismantling may be stropped and/or honed. Other ob- 5 jects of the invention are the details of construction of the parts whereby automatic ,action is secured and also whereby a better shaving adjustment is readily had, and also a smoother shaving action.

In the drawings accompanying this application Fig. 1 is a'front elevation of my improved razor.

Fig. 2 is a side View of the razor with blade shown in shaving position against the guard. Fig. 3 is a side view with guard pulled down and blade against a strop passing the actuating rod which forth.

Fig. 4 is a detached side view of the blade on its square axle.

Fig. 5 is an end view of the hollow ground blade with its square axle fitted in a slot in the round axle of the razor.

Fig. 6 is a view of the blade assembly 7 looking directly at the edge of the blade.

Fig. 7 is a plan view showing the reversing gear mechanism which flips the blade in opposite direction when over the bone.

Fig. 8 is a plan view of thestrop with'the hone at one end.

Fig. 9 is a side view'of the strop and'hone.

Fig. 10 is a cross section of the'strop and honeas' seen along the line 10-10 of Fig. 8.

Fig. 11 is an enlarged fragmentary view of blade guard. I

Fig. 12 is a sectional viewon line 12- -12 of Fig. 11.

riefly described, the invention comprises a specially organized safety razor cooperating with a specially organized strop which carriesa honing stone at one end, the arrangement being such that with the strop passing between the framemembers of the r razor when the razor is worked back and forth'the single-edged hollow ground blade will flip back and forth to drag on the leather surface of the strop, but when coming over the bone portion the blade will automatically be flipped in the opposite direction to advance with cutting edge leading over the hone, then flips the blade back and p 1930. Serial No. 470,612.

upon reverse stroke the blade will automatically, reverse to return cutting edge leading over the hone and when arriving at the end of the hone the blade will again reverse itself so as to drag cutting edge following over the strop portion.

To carry out the above both special razor A mechanism and stoparrangement and mech anism are required as neither will operate without the other.

In the drawings showing my construction 1 is the handle of the razor, 2 the guard adjustably carried-on the upper end of the handle, 3 the frame, 4 the hollow ground single edge blade resting upon the guard in Figs 1 and 2 with its'side edges adjacent the cutting edge held in position by small spring latches or detents 5.

The. blade is permanently secured at its base to a square axle 6 provided with two small retainer pins 7 nearits ends and which square axle fits into a slot in a round shaft 8 and locks in place by means of the pins 7 engaging in L-shaped slots on two small colla-rs 9 rotatably mounted on shaft 8 and at least one of which collars is also movable longitudinally so the pins can be freed for removal of the blade withits square axle.

Shaft 8 is rotatably mounted in opposite ends offram'e 3 and carries at one end a gear 10 normally meshing with a similar gear 11 carried at the end of a long hollow shaft or sleeve 12 which is slidably but non-rotatably telescoped over a shaft 13 which carries at its end asmall gear 14; arranged in line with but spaced from a similar. smallgear 15 carried on the end of blade shaft 6. I

Sleeve 12 is prevented from rotating with respect to shaft 13 by any suitable. means such as a flat spot, spline, or pin 16 and slot as indicated, and an intermediate or shift shaft 17 is rotatably and slidably mounted in the frame so that a gear 18 carried at its end may be slid between gears 14 and 15 to engage them for rotation.

Shift shaft 17 is yoked to sleeve shaft 12 by means of a double-aperturedplate 19 en gaging a groove around both shafts and both are "normally forced to the left (Fig. 7) by spring 20 to hold gear 15 out of mesh and gear 11 in mesh with gear 10 as shown in Fig. 1, but if shift shaft 17 is moved lengthwise a slight distance it will free gear 11 and engage gear 15.

The special strop arrangement comprises a flexible stropping portion 21 as of leather and a rigid honing portion 22 as of stone or com 'pound, with the operative surfaces of both portions in one plane or substantially so.

This hone is preferably mounted on a metal plate 23 as by engagement of grooves in its edges and/0r cementing in place, while the leather is preferably riveted to as at 2 1 to one end of the plate and the other end of the plate is provided with a hook 25 or other suspension device.

The strop is of a size to pass through between the frame sides as shown in Fig. 3 when the guard 2 is lowered out of the way and as the razor ismoved back and forth the friction of the strop on sleeve 12 will automatically flip the blade to dragging position against the strop, but when the hone 22 is reached a portion 26 of the margin 27 of plate 23 bent out in the form of a guiding cam engages over gear 18 and slidesshaft 17 thus engaging gears 18 and 15, and disengage gears 10, 11 so that the blade will instantly over from dragging to leading position fli ad ancing along the hone cutting edge first with shaft 17 is held over by margin 27 of the plate. Upon reverse movement of the razor the reverse action takes place, the blade returning edge first over the hone then flipping back at cam 26 to drag over the strop portion.

To provide for lowering the guard 2 to give clearance for the strop, the guard is provided with side arms or frame members 28 of sheet metal bent over and riding snugly in angularly disposed slots 29 on the shank 30 of the razor frame or upper end of the handle, while a thumb gear 31 mounted between the guard arms 28 engages teeth 32 formed on the shank so that by rolling it with thetip of the thumb or forefinger the guard may be raised andlowered.

Also by thus raising and lowering the guard the projection of the cutting edge of the blade with respect to the guard may be accurately adjusted.

In the operation of the razor on the strop, the motion should be slowed down when the hone portion is reached to prevent slapping the blade violently upon the hone, and to minimize this cifect I may provide any form of shock absorber such for instance as asmall spring wire 33 extending radially from shaft 17 adjacent gear 18 and which wire will strike or stop 34 on the'frame just before the blade hits the hone so that it will come gently in contact. This feature being on shaft 17 is of course inoperative when stropping on the leather portion 21.

In order to effect a smoother shaving action and to facilitate the adjustment ofthe shaving edge of the blade, I provide a specially constructed guard structure 2, best shown in Figs. 11 and 12, comprising a bar 35 secured at opposite ends to an angular extension 36 of side arms 28. The blade 4 of the razor is supported parallel with and adjacent its cut-- ting edge against the bar 35 and is held thereagainst from above by inwardly turned spring detents 5 carried at the outer end of the extensions 36 of side arms 28.

The upper surface of bar 35 is convexly curved and the under side of spring detents 5 are oppositely curved so that the blade is firmly held between bar 35 and detents 5 at any angle of the blade relative thereto without any twisting strain as would otherwise be apt to occur when adjusting the cutting edge of the blade through 31.

Projecting downwardly and forward of bar 35 are a row of spaced teeth 37 carrying at their outer ends each a ball 38 beneath and parallel with the cutting edge of the blade 4 when it is in shaving position.

In shaving, the razor is supported against the face of the user by ball 38, thus providing an easier and smoother shaving action since only one point of each ball is in contact with the face, and what smallfrictional resistance that exists is the same irrespective of the angle of the edge of the blade with the face in any direction.

operation of thumb gear It will be noted that the ball shaped ends of the guard teeth permit the blade to be withdrawn from between bar 35 and spring detents 5 through downward rotation of thumb gear 31 without danger of scraping the edge of the blade against the guardteeth due to the change inits angle of the blade relative to the guard during this operation, and the cutting edge of the blade is readily adjusted for shaving through a very slight change in the angle of the blade relative to the ball ends 37. V

It is manifest, of course, that the blade can be removed without operation of thumb gear or changing the position of theguard, by

merely forcing the spring detents apart to clear the ends of the blade.

Having thus described my improvedstr'opping and honing razor, I claim:

1. In combination, frame,

a pivotally mounted blade onsaid frame,

a strop along which said frame is adapted to be moved, a hone on said strop,

a razor provided with a edgefirst when over said means whereby the blade is automatically flipped to dragging position on said strop upon back and forth movement of said frame, means whereby the blade is flipped to advance with cutting edge first when over said hone, and means for insuring gentle contact of said blade and said hone.

3. In combination, a razor provided with a frame, a pivotally mounted blade on said frame, a strop along which said frame is adapted to be moved, a hone on said strop, means whereby the blade is automatically flipped to dragging position on said strop upon back and forth movement of said frame, means whereby the blade is flipped to advance with cutting edge first when over said hone, and a spring shock absorbing device for insuring gentle contact of said blade and said hone.

4,. A razor of the safety type comprising a handle, a frame at one end of the handle, a revolvable shaft on said frame,ablade mounted on said shaft to swing from one position to the opposite upon rocking the shaft, a gear on opposite ends of said shaft, a sleeve shaft rotatably'mounted on said frame, a gear on the sleeve shaft engaging one of the first mentioned gears, a shaft within the sleeve shaft provided with a gear spaced from the other of said first gears, a slide shaft carried onsaid frame provided with a gear on its end adapt-- ed to engage the two spaced gears when the slide shaft is slid and to disengage the gear On said sleeve form its meshing gear.

5. In a structure as specified in claim 4, automatic means for reversing the position of the parts after said slide shaft is slid.

6. A razor of the safety type comprising a handle, a frame at the end of the handle, a blade pivotally mounted on said handle to flip back and forth on a strop when moved therealong and reversing gearing on said frame to actuate said blade to flip in reverse directions during a one-way movement of the razor along the strop.

7. A razor of the safety type comprising a handle, a frame at the end of the handle, a blade pivotally mounted on said handle to flip back and forth on a strop when moved therealong and reversing gearing on said frame to actuate said blade to flip in reverse directions during a one-way movement of the razor along the strop, and a strop adapted to cooperate with said razor provided with means for tripping said reversing gear.

8. A razor of the safety type comprising a handle, a frame at the end of the handle, a blade pivotally mounted on said handle to flip back and forth on arstrop when moved therealong and reversing gearing on said frame to actuate said blade to flip in reverse directions during a one-way movement of the razor along the strop, a strop adapted to cooperate with said razor provided with means for tripplng said reverslng gear, and a hone on said strop arranged toreceive the blade when flipped to advance cutting edgefirst.

9. A razor of the safety type comprising an elongated handle, a frame secured to and extending across the upper end of the handle, a razor blade pivotally mounted at its ends to said frame, a guard extending along under the cutting edge of said blade provided with clips engaging over opposite ends of the blade adjacent the cutting edge, said clips being open in front for the cutting edge to project therethrough, means mounting said guard for bodily sliding up and down on said handle whereby upon downward movement of the guard said clips will be withdrawn from said blade and upon upward movement of the guard said clips will reengage the blade, a finger piece on the guard structure adapted for sliding the same, and means stabilizing the guard in various positions of adjustment to control the projection of the blade through said clips.

FRANK ROSENTHAL. 

